Upgrade google-cloud to 0.30.0. This updates google-cloud-datastore to 1.4.0 (needed by some users), and also google-cloud-core and google-cloud-storage. (#609)
Upgrade google-cloud to 0.30.0. This updates google-cloud-datastore to 1.4.0 (needed by some users), and also google-cloud-core and google-cloud-storage. (#609)


yebrahim/pydatalab,yebrahim/pydatalab,googledatalab/pydatalab,yebrahim/pydatalab,googledatalab/pydatalab,googledatalab/pydatalab